50mm bolt and spring which replaces the stock grub screw and allows you to fine tune the idle speed on your TPI bike. A very good stand-alone modification, even for stock bikes.
This is the exact same idle screw & spring that is included in the TSP Power Kits.
TPI Idle bolt Video Installation:
ITEMS ORDERED IN STOCK ARE SENT EVERY DAY 12PM. Orders placed before 9AM go the same-day!

















